Opencode Antigravity Image Plugin

⚠️ UNOFFICIAL TOOL: This is an independent, community-developed plugin. It is not affiliated with, endorsed by, or supported by Google. Use at your own risk.

OpenCode plugin for image generation using Gemini 3 Pro Image model.

Features

• Text-to-image generation - Create images from text descriptions
• Image editing - Modify existing images with text instructions
• Multiple images - Generate up to 4 variations per request
• Character consistency - Session-based generation for consistent characters
• Configurable output - Custom paths, filenames, and aspect ratios
• Multi-account support - Rate limit tracking and automatic account rotation

Prerequisites

This plugin requires opencode-antigravity-auth to be installed and configured with at least one Google account.

Installation

For Humans

Option 1: Add to OpenCode config (Recommended)

Add to your ~/.config/opencode/opencode.json:

{
  "plugin": [
    "opencode-antigravity-image"
  ]
}

Option 2: Local development

git clone <repo-url>
cd opencode-antigravity-image
bun install

Then add to ~/.config/opencode/opencode.json:

{
  "plugin": [
    "/path/to/opencode-antigravity-image"
  ]
}

For LLM Agents

Step-by-Step Instructions

1. Check Prerequisites: Ensure opencode-antigravity-auth is installed in ~/.config/opencode/opencode.json.

2. Install Plugin: Add opencode-antigravity-image to the plugin array in ~/.config/opencode/opencode.json.

   {
     "plugin": [
       "opencode-antigravity-auth",
       "opencode-antigravity-image"
     ]
   }

Verification

Ask the user to generate an image to verify the installation:

\generate-image A cyberpunk cat

Usage

Basic Image Generation

• Via generate-image command

\generate-image A cyberpunk cat in neon-lit Tokyo streets, file name should be cyberpunk-cat save it at ~/Pictures

• Using tool format:

generate_image({ prompt: "A cyberpunk cat in neon-lit Tokyo streets" })

With Aspect Ratio

generate_image({ 
  prompt: "A majestic mountain landscape", 
  aspect_ratio: "16:9" 
})

With Custom Filename

generate_image({
  prompt: "A dragon flying over mountains",
  file_name: "my-dragon"
})

Image Editing

generate_image({
  prompt: "Change the sky to a dramatic sunset",
  input_image: "./my-photo.jpg"
})

Multiple Variations

generate_image({
  prompt: "A fantasy castle in the clouds",
  count: 4
})

Character Consistency

// Create a character
generate_image({
  prompt: "Create a hero character: Luna, a silver-haired warrior",
  session_id: "luna-character"
})

// Generate new scenes with the same character
generate_image({
  prompt: "Show Luna fighting a dragon",
  session_id: "luna-character"
})

Custom Output Path

generate_image({
  prompt: "Abstract art piece",
  output_path: "./my-images/"
})

Restrict Which Google Accounts Are Used (Optional)

If you have multiple Google accounts configured in antigravity-accounts.json, you can restrict image generation to a subset.

Option A: environment variable (comma-separated)

export OPENCODE_ANTIGRAVITY_IMAGE_ALLOWED_EMAILS="[email protected],[email protected]"

Option B: config file (checked in this order)

• ~/.config/opencode/antigravity-image.json
• ~/.local/share/opencode/antigravity-image.json

Example antigravity-image.json:

{ "allowedEmails": ["[email protected]", "[email protected]"] }

Note: this matches on the email field in antigravity-accounts.json. If your accounts file has no emails, re-auth with opencode auth login so they get populated.

Parameters

Parameter	Type	Default	Description
prompt	string	(required)	Description of the image or editing instruction
aspect_ratio	string	"1:1"	Aspect ratio: 1:1, 2:3, 3:2, 3:4, 4:3, 4:5, 5:4, 9:16, 16:9, 21:9
output_path	string	.opencode/generated-images/	Custom directory for saving images
file_name	string	-	Custom filename (without extension)
input_image	string	-	Path to existing image for editing
count	number	1	Number of images to generate (1-4)
session_id	string	-	Session ID for character consistency

Output

Images are saved to .opencode/generated-images/ in your project by default, with filenames like:

{prompt-slug}-{timestamp}.jpg

Or with custom filename:

{custom-name}.jpg

The tool returns markdown with:

• Embedded image references
• File paths
• Session info (if used)
• Model and account info

Sessions

Sessions are stored in .opencode/generated-image-sessions/ within your project directory. Each session maintains conversation history for character consistency.

License

MIT

Legal

Intended Use

• Personal / internal development only
• Respect internal quotas and data handling policies
• Not for production services or bypassing intended limits

Warning

By using this plugin, you acknowledge:

• Terms of Service risk — This approach may violate ToS of AI model providers
• Account risk — Providers may suspend or ban accounts
• No guarantees — APIs may change without notice
• Assumption of risk — You assume all legal, financial, and technical risks

Disclaimer

Not affiliated with Google. This is an independent open-source project.

"Antigravity", "Gemini", "Google Cloud", and "Google" are trademarks of Google LLC.